RU2816150C1 - Aerosol generating system with ventilation chamber - Google Patents

Abstract

FIELD: smoking accessories.

SUBSTANCE: invention relates to devices simulating the tobacco smoking process. Aerosol-generating system comprises an aerosol-generating article comprising an aerosol-forming substrate rod, and a filter located downstream of the aerosol-forming substrate rod. Aerosol-forming substrate rod and the filter are assembled inside the wrapper. Aerosol-generating article comprises a ventilation zone located on the wrapper. Ventilation zone comprises multiple holes passing through wrapper. Aerosol-generating device has a distal end and a mouthpiece end and comprises a body having a peripheral wall. Peripheral wall forms a cavity of the device for placement of the aerosol-generating article with possibility of its removal at the mouth end of the device. When the aerosol generating article is placed inside the cavity of the device, ventilation zone of the aerosol generating article is located inside the cavity and part of the inner surface of the peripheral wall covering the ventilation zone is spaced from the aerosol generating article, to form a ventilation chamber inside the peripheral wall. Ventilation chamber is made with possibility of fluid communication with external part of aerosol-generating device, through mouth end of device and ventilation zone of aerosol-generating article. Air is provided with the possibility of entering the ventilation chamber through the mouth end of the aerosol generating device, when the aerosol-generating article is placed inside the cavity of the device. Thickness of the part of the peripheral wall forming the ventilation chamber differs from the thickness of the other part of the peripheral wall.

EFFECT: increased efficiency of aerosol cooling and prevention of ventilation zone overlapping.

18 cl, 4 dwg

Description

The present invention relates to an aerosol generating system comprising an aerosol generating device configured to receive an aerosol generating article. The present application also relates to an aerosol generating device having a ventilation chamber.

Aerosol-generating products in which an aerosol-generating substrate, such as a tobacco-containing substrate, is heated rather than burned are known in the art. Typically, in such heated smoking articles, an aerosol is generated by transferring heat from a heat source to a physically separate substrate or aerosol-forming material, which may be located in contact with, within, around, or downstream of the heat source. During use of the aerosol-generating article, volatile compounds are released from the aerosol-forming substrate through heat transfer from the heat source and are entrained in air drawn through the aerosol-generating article. As the released compounds cool, they condense to form an aerosol.

A number of prior art documents disclose aerosol generating devices for consuming aerosol generating articles. Such devices include, for example, electrically heated aerosol generating devices, in which the aerosol is generated by transferring heat from one or more electrical heating elements of the aerosol generating device to an aerosol generating substrate of the heated aerosol generating article.

However, when an aerosol-generating article having vents (referred to as a "ventilation zone") on its outer wrap is housed within known aerosol-generating devices, such vents may be exposed to the outside environment of the device. During use of the product within the device, vents can provide a beneficial dilution of the aerosol flowing through the product to be delivered to the consumer, as well as a ventilation air flow that can reduce the temperature of the generated aerosol.

Opening the vents may cause the user to unintentionally block the vents of the product with their fingers or lips during normal use of the aerosol generating system. In turn, such blocking can affect the consumer's sensory experience by increasing the effective draw resistance of the product and preventing optimal aerosol formation and cooling. Therefore, it would be desirable to provide an aerosol generating system that eliminates at least this problem.

The present description provides an aerosol generating device configured to accommodate an aerosol generating article. The aerosol generating article may comprise a rod of aerosol generating substrate. The aerosol generating article may include a filter assembled in a wrapper. The aerosol generating article may further comprise a ventilation zone located on the wrapper. The ventilation zone may include a plurality of openings extending through the wrapper. The aerosol generating device may have a distal end and a mouth end. The aerosol generating device may include a housing. The housing may include a peripheral wall defining a cavity of the device for housing the aerosol generating article so that it can be removed from the mouth end of the device. The aerosol generating device may include a heater for heating the aerosol generating substrate when the aerosol generating article is placed within the cavity of the device. The aerosol generating device may be configured such that, when the aerosol generating article is placed inside the cavity of the device, the ventilation zone of the aerosol generating article is located inside the cavity and a portion of the inner surface of the peripheral wall covering the ventilation zone is spaced from the aerosol generating article. aerosol.

According to the present application, an aerosol generating system may be provided, which may comprise an aerosol generating article and an aerosol generating device. The aerosol generating article may comprise a rod of aerosol generating substrate. The aerosol generating article may include a filter located downstream of the aerosol generating substrate rod. The aerosol-forming substrate rod and the filter may be collected within the wrapper. The aerosol generating article may include a ventilation zone located on the wrapper. The ventilation zone may include a plurality of openings extending through the wrapper. The aerosol generating device may have a distal end and a mouth end. The aerosol generating device may include a housing. The aerosol generating device may include a heater for heating the aerosol generating substrate when the aerosol generating article is placed within the cavity of the device. The housing may include a peripheral wall. The peripheral wall may define a cavity of the device for receiving a removable aerosol generating article at the mouth end of the device. The aerosol generating system is configured such that when the aerosol generating article is placed inside the cavity of the device, the ventilation zone of the aerosol generating article is located inside the cavity and a portion of the inner surface of the peripheral wall covering the ventilation zone is spaced away from the aerosol generating article.

According to the present invention, there is provided an aerosol generating system comprising: an aerosol generating article and an aerosol generating device. The aerosol-generating article contains an aerosol-generating substrate rod and a filter located downstream of the aerosol-generating substrate. The aerosol-forming substrate rod and the filter are assembled inside the wrapper. The aerosol generating product includes a ventilation zone located on the wrapper. The ventilation zone contains a plurality of holes extending through the wrapper. The aerosol generating device has a distal end and a mouth end and includes a housing and a heater for heating the aerosol generating substrate when the aerosol generating article is placed within the cavity of the device. The housing has a peripheral wall. The peripheral wall defines a cavity of the device for receiving a removable aerosol generating article at the mouth end of the device. The aerosol generating system is configured such that when the aerosol generating article is placed inside the cavity of the device, the ventilation zone of the aerosol generating article is located inside the cavity and a portion of the inner surface of the peripheral wall covering the ventilation zone is spaced away from the aerosol generating article.

The aerosol generating device of the aerosol generating system may be configured such that, when the aerosol generating article is placed inside the cavity of the device, the ventilation zone of the aerosol generating article is located inside the cavity and a portion of the inner surface of the peripheral wall covering the ventilation zone is dispersed from the aerosol-generating product.

Part of the inner surface of the peripheral wall covering the ventilation zone from the aerosol-generating product ensures that during use of the aerosol-generating system, the ventilation zone of the aerosol-generating product is covered by the housing of the aerosol-generating device and is not open to the outside of the device.

Additionally, such a portion of the inner surface of the peripheral wall spaced from the ventilation zone of the product also allows air or aerosol to pass between the inner surface of the peripheral wall and the ventilation zone of the product. This means that the ventilation area can perform its function of providing ventilation to the product without being covered or blocked by the consumer.

Such portion of the inner surface of the peripheral wall spaced from the ventilation zone of the aerosol generating article may refer to a portion of the inner surface of the peripheral wall that is more spaced from the aerosol generating article than the remaining, or other, portions of the inner surface of the peripheral wall. In other words, such part of the inner surface of the peripheral wall spaced from the ventilation zone of the aerosol generating article is a part of the inner surface of the peripheral wall that is more spaced from the aerosol generating article than the rest or other parts of the inner surface of the peripheral wall. In other words, such part of the inner surface of the peripheral wall spaced from the ventilation zone of the aerosol generating article is a part of the inner surface of the peripheral wall that is at a greater distance from the aerosol generating article than the rest or other parts of the inner surface of the peripheral wall.

As used herein, the term “aerosol generating device” refers to a device containing a heating element that interacts with an aerosol generating substrate of an aerosol generating article to generate an aerosol.

As used herein, the term “longitudinal” refers to the direction corresponding to the major longitudinal axis of the aerosol generating article or device that extends between the upstream and downstream ends of the aerosol generating article or aerosol generating device .

As used herein, the terms "upstream" and "downstream" describe the relative positions of elements or parts of elements of an aerosol generating article or device with respect to the direction in which the aerosol is transported through the aerosol generating article, in time of use.

During use, air is drawn longitudinally through the aerosol-generating product. The term "transverse" refers to a direction that is perpendicular to the longitudinal axis. Any reference to a “cross-section” of an aerosol-generating article or component of an aerosol-generating article refers to a cross-section unless otherwise noted.

The term "length" refers to the size of the aerosol generating component of an article or device in the longitudinal direction.

As used herein, the term “homogenized tobacco material” covers any tobacco material formed by agglomeration of particles of tobacco material. Sheets or webs of homogenized tobacco material are formed by agglomeration of bulk tobacco obtained by grinding or otherwise pulverizing one or both of tobacco leaf blades and tobacco leaf stalks. Additionally, the homogenized tobacco material may contain trace amounts of one or more of tobacco dust, tobacco fines, and other bulk tobacco by-products generated during tobacco processing, handling, and shipping. Sheets of homogenized tobacco material can be produced by casting, extrusion, papermaking processes, or any other suitable methods known in the art.

The term "porous" is used herein to mean a material in which a plurality of pores or openings are provided that allow air to pass through the material.

The term “ventilation rate” may be used throughout this specification to refer to the volumetric ratio between the air flow admitted into an aerosol generating article through a ventilation zone (vent air flow) and the sum of the aerosol containing air flow and the ventilation air flow. The higher the ventilation level, the greater the dilution of the aerosol flow delivered to the consumer. The ventilation level is measured in the aerosol generating article itself, i.e., without inserting the aerosol generating article into a suitable aerosol generating device for heating the aerosol generating substrate.

The aerosol generating article of the present invention comprises a rod of aerosol generating substrate. The aerosol generating article may further comprise a downstream section located downstream of the aerosol generating substrate rod. This downstream section can be considered as a filter for the aerosol generating product. The filter (or downstream section of the product) or mouthpiece segment may include a plug of filter material and a hollow tubular segment in a position between the aerosol-forming substrate rod and the mouthpiece segment. All three elements are preferably aligned in the longitudinal direction. The aerosol-forming substrate rod preferably contains at least an aerosol-forming agent. In some embodiments, an aerosol generating article in accordance with the present invention may comprise an additional support member (or support segment) positioned between and longitudinally aligned with the aerosol generating substrate rod and the hollow tubular segment. In detail, the support element (or support segment) is preferably provided immediately downstream of the rod and immediately upstream of the hollow tubular element (or segment). The additional support element or segment may be tubular.

The ventilation zone of the aerosol generating product may be located anywhere along the product. The ventilation zone may be located at a position downstream of the aerosol-forming substrate rod. The ventilation zone may be located at a position along the hollow tubular segment of the filter or the mouthpiece segment of the product. The ventilation zone may be located at a location along the filter material plug (or mouthpiece segment) of the filter of the product.

The expression "embedded" may refer to the fact that a component or element is fully or partially contained within another component or element. For example, the expression “an aerosol-generating article is housed within a device cavity” refers to an aerosol-generating article that is fully or partially housed within a device cavity for an aerosol-generating article. When the aerosol generating article is housed within the device cavity, the aerosol generating article may abut the distal end of the device cavity. When the aerosol-generating article is housed within the device cavity, the aerosol-generating article may be located in significant proximity to the distal end of the device cavity. The distal end of the device cavity may be defined by an end wall.

The length of the device cavity can range from about 10 mm to about 50 mm. The length of the device cavity can range from about 20 mm to about 40 mm. The length of the device cavity can range from about 25 mm to about 30 mm.

A space formed by a portion of the inner surface of the peripheral wall may define a ventilation chamber within the peripheral wall. The ventilation chamber may be configured to be in fluid communication with the exterior of the aerosol generating device and the ventilation zone of the aerosol generating article. Preferably, the ventilation chamber is formed within the thickness of the peripheral wall. In other words, the ventilation chamber may be formed on the surface (eg, on the inner surface portion or inner surface) of the peripheral wall or within the thickness of the peripheral wall, at a position between the inner and outer longitudinal surfaces of the peripheral wall.

When an aerosol generating article is housed within a device cavity, the vent area of the article is configured to be aligned with and surrounded by a vent chamber defined within the device. This ensures that during normal use of the aerosol generating system, the vent zone of the aerosol generating article is covered by the housing of the aerosol generating device such that the vent zone is not exposed to the exterior of the device. It also allows air or aerosol to flow between the ventilation chamber of the device and the ventilation area of the product. This means that the ventilation area can perform its function of providing ventilation to the product without being covered or blocked by the consumer's mouth or fingers during normal use.

The ventilation chamber may be located adjacent to the mouth end of the aerosol generating device. The ventilation chamber may extend from the mouthpiece end of the aerosol generating device. In such embodiments, the ventilation chamber may be in direct fluid communication with the exterior of the aerosol generating device. The term "direct fluid communication" refers to the fact that no other element or air flow path is needed to communicate fluid (air) with the plenum. For example, a ventilation chamber being in direct fluid communication with the exterior of an aerosol generating device means that air from the exterior of the aerosol generating article enters directly into the ventilation chamber. In other words, if air exits the plenum, such air will enter directly into the exterior of the aerosol-generating product. Preferably, the ventilation chamber is configured to be in fluid communication with the exterior of the aerosol generating device through the mouth end of the aerosol generating device. Preferably, the ventilation chamber is configured to be in fluid communication with the exterior of the aerosol generating device through a mouth end surface of the aerosol generating device. In other words, air is preferably configured to enter the ventilation chamber through the mouth end or mouth end surface of the aerosol generating device.

Positioning the vent chamber adjacent to the mouthpiece end allows air to flow into the vent chamber to provide fluid communication with the aerosol-generating article and its vent zone, if the product contains a vent zone. The ventilation chamber may include two ends, a first end and a second end. The second end of the ventilation chamber may be closer to the mouthpiece end of the aerosol generating device than the first end of the ventilation chamber. The second end, or proximal end, of the ventilation chamber may be located at the mouth end of the aerosol generating device. In such embodiments, the second end of the vent chamber may be open and the first end of the vent chamber may be closed. Having the second end of the vent chamber open allows air to easily enter the vent chamber while simultaneously ensuring that the vent area of the aerosol generating product is hidden from the user during normal use.

In embodiments where the second end of the vent chamber is not located at the mouth end of the aerosol generating device, the second end of the vent chamber may be located at a distance of at least about 1 mm from the mouth end (surface) of the aerosol generating device (or the open end of the device cavity ). The second end of the ventilation chamber may be located at a distance of at least about 2 mm from the mouth end of the aerosol generating device. The second end of the ventilation chamber may be located at a distance of at least about 3 mm from the mouth end of the aerosol generating device.

The first end of the ventilation chamber may be located at a distance of at least about 10 mm from the distal end of the device cavity. The first end of the ventilation chamber may be located at a distance of at least about 20 mm from the distal end of the device cavity. The first end of the ventilation chamber may be located at a distance of at least about 30 mm from the distal end of the device cavity.

The term "mouth end" refers to the portion of an element or component that is configured to be in or near the user's mouth during normal use of the element or component. The mouth end may also correspond to a downstream end. For example, the mouth end of the aerosol generating article may also be the downstream end of the article. The mouthpiece end of the aerosol generating article or device is configured to be placed in or near the mouth of a consumer during normal use. The mouth end of the aerosol generating device may also be referred to as the proximal end of the aerosol generating device. The mouth end of the aerosol generating device may refer to a surface of the mouth end of the aerosol generating device that is configured to receive the aerosol generating article. Therefore, the open end of the device cavity can be defined on the surface of the mouth end of the aerosol generating device.

In some embodiments, the ventilation chamber may be located in a longitudinal position away from the mouth end of the aerosol generating device.

The expression "longitudinal position away from the mouth end of the aerosol generating device" in the present context refers to longitudinal positions that are not located at the mouth end of the aerosol generating device. Thus, a longitudinal position away from the mouth end of the aerosol generating device refers to a longitudinal position that is different from (or at a distance from) the longitudinal position of the mouth end of the aerosol generating device.

By providing a vent chamber away from the mouth end of the aerosol generating device, the vent chamber may define a cavity or space around the aerosol generating article that is housed within the cavity of the device and away from the mouth end of the device. When the aerosol generating article is housed in the article, such a ventilation chamber is in fluid communication with the exterior of the aerosol generating article. The outer portion of the aerosol generating article may be defined by the wrapper. The wrapper may be porous. The wrapper may be sufficiently porous to allow air from the ventilation chamber to enter the aerosol-generating article. By allowing air to enter, the ventilation chamber can help cool the product, which can improve the nucleation of aerosol particles within the product. The vent chamber may be more likely to promote nucleation when positioned longitudinally away from the mouthpiece end, since the vent chamber is more likely to overlap the much upstream portion of the aerosol generating article, closer to where aerosol generation occurs. Accordingly, such a position of the ventilation chamber can improve the delivery of the aerosol to the consumer.

In such embodiments, the ventilation chamber has two ends, a first end and a second end. The second end of the ventilation chamber is closer to the mouthpiece end of the device than the first end of the ventilation chamber. In such embodiments, both ends of the ventilation chamber are located away from the mouth end of the aerosol generating device. In other words, the second end is not located at the mouthpiece end of the device.

In such embodiments, air may flow from the exterior of the device into the vent chamber through a gap or space provided between the peripheral wall and the aerosol generating article when positioned in the cavity of the device and passing between the vent chamber and the mouthpiece end of the device.

In embodiments in which the vent chamber is located in a longitudinal position away from the mouth end of the aerosol generating device, the vent chamber may be configured to be in fluid communication with the exterior of the aerosol generating device through an inlet opening of a chamber formed in the housing.

The chamber inlet may be a separate element relative to the cavity of the device. In other words, the chamber inlet may not be defined by the cavity of the device, but may instead be defined by the housing. The chamber inlet may be formed within a peripheral wall that defines a cavity of the device. Preferably, the chamber inlet is defined within the thickness of the peripheral wall or on the peripheral wall. In other words, the chamber inlet may be defined on a surface (eg, on an inner portion or inner surface) of the peripheral wall or within a thickness of the peripheral wall at a position between the inner and outer longitudinal surfaces of the peripheral wall.

The chamber inlet provides fluid communication between the exterior of the aerosol generating device and the ventilation chamber. Thus, air from the exterior of the device may be in fluid communication with the wrapper of the aerosol generating article when it is housed within the device. This fluid communication enhances aerosol generation by promoting nucleation and cooling of the aerosol generated in the article.

When the aerosol generating article has a vent zone on the wrapper, air coming from the outside of the aerosol generating device through the chamber inlet into the vent chamber may pass through the vent zone of the product. This provides ventilation for the aerosol generating product.

Moreover, in embodiments in which the ventilation chamber is located in a longitudinal position away from the mouth end of the aerosol generating device, the generated aerosol may accumulate within the ventilation chamber. This aerosol accumulation may improve the user experience by providing an additional source of aerosol. The user may puff on such additional aerosol source.

In some embodiments, the chamber inlet may extend between the ventilation chamber and the mouth end of the aerosol generating device. This allows air from outside the device to enter the plenum through the plenum inlet.

The chamber inlet may extend along any direction from the vent chamber to establish fluid communication between the vent chamber and the exterior of the device. The chamber inlet may extend substantially along a direction that is parallel to the longitudinal axis of the aerosol generating device. The chamber inlet may extend substantially along a direction that is perpendicular to the longitudinal axis of the aerosol generating device.

The chamber inlet may have a circular cross-section. The chamber inlet may have an annular cross-section. The inlet opening of the chamber may have a cross-section in the form of an annular sector. "Annular sector" refers to a part or section of an annular shape or ring.

The chamber inlet and the ventilation chamber may have the same cross-sectional shape. For example, the ventilation chamber may have an annular shape, and the inlet opening of the chamber may have an annular shape. For example, the ventilation chamber may be circular, and the inlet opening of the chamber may also be circular. Alternatively, the chamber inlet and the ventilation chamber may have different cross-sectional shapes. For example, the chamber inlet may be circular, and the ventilation chamber may be annular.

The chamber inlet may have a cross-sectional area that is smaller than the cross-sectional area of the ventilation chamber. The cross-sectional area of the chamber inlet may vary along the longitudinal direction.

The chamber inlet can be cylindrical or conical.

The plenum inlet may have a cross-sectional area that is less than or equal to approximately 75 percent of the cross-sectional area of the plenum. The plenum inlet may have a cross-sectional area that is less than or equal to approximately 50 percent of the cross-sectional area of the plenum. The plenum inlet may have a cross-sectional area that is less than or equal to approximately 25 percent of the cross-sectional area of the plenum. The plenum inlet may have a cross-sectional area that is less than or equal to approximately 20 percent of the cross-sectional area of the plenum. The plenum inlet may have a cross-sectional area that is less than or equal to approximately 10 percent of the cross-sectional area of the plenum. The plenum inlet may have a cross-sectional area that is less than or equal to approximately 5 percent of the cross-sectional area of the plenum.

The chamber inlet diameter may be equal to or greater than approximately 0.1 mm. The chamber inlet diameter may be equal to or greater than approximately 0.2 mm. The chamber inlet diameter may be equal to or greater than approximately 0.5 mm.

The chamber inlet diameter may be equal to or less than approximately 2 mm. The chamber inlet diameter may be equal to or less than approximately 1.5 mm. The chamber inlet diameter may be equal to or less than approximately 1 mm.

The chamber inlet diameter may range from about 0.1 mm to about 2 mm. The chamber inlet diameter may range from about 0.2 mm to about 1.5 mm. The chamber inlet diameter may range from about 0.5 mm to about 1 mm.

The ratio of chamber inlet diameter to plenum depth may be equal to or less than about 30. The ratio of chamber inlet diameter to plenum depth may be equal to or less than about 20. The ratio of chamber inlet diameter to plenum depth may be equal to or less than about 15 .

The ratio of chamber inlet diameter to plenum depth may be equal to or greater than about 2. The ratio of chamber inlet diameter to plenum depth may be equal to or greater than about 5. The ratio of chamber inlet diameter to plenum depth may be equal to or greater than about 10 .

The range of ratios of chamber inlet diameter to plenum depth may be from about 2 to about 30. The range of ratios of chamber inlet diameter to plenum depth may be from about 5 to about 20. The range of ratios of chamber inlet diameter to plenum depth may be from about 10 to about 15.

If the depth of the plenum varies, the depth of the plenum may refer to the average depth of the plenum. If the chamber inlet diameter varies, the chamber inlet diameter may refer to the average diameter of the chamber inlet.

The length of the chamber inlet may be equal to or greater than approximately 1 mm. The length of the chamber inlet may be equal to or greater than approximately 2 mm. The length of the chamber inlet may be equal to or greater than approximately 3 mm.

The chamber inlet length may be equal to or less than approximately 15 mm. The length of the chamber inlet may be equal to or less than approximately 10 mm. The chamber inlet length may be equal to or less than approximately 6 mm. The chamber inlet length may be equal to or less than approximately 4 mm.

The length of the chamber inlet can range from about 1 mm to about 15 mm. The length of the chamber inlet may range from about 1 mm to about 6 mm. The length of the chamber inlet can range from about 2 mm to about 6 mm. The length of the chamber inlet may range from about 3 mm to about 4 mm.

The length of the chamber inlet may determine the distance of the ventilation chamber from the mouth end of the aerosol generating device.

There may be multiple chamber inlets. In such embodiments, the chamber inlets may be uniformly and radially distributed at the mouth end of the device.

In some embodiments, the thickness of the portion of the peripheral wall defining the ventilation chamber may be different from the thickness of the other portion of the peripheral wall.

In some embodiments, the thickness of the portion of the peripheral wall defining the ventilation chamber may be less than the thickness of the other portion of the peripheral wall. In some embodiments, the thickness of the portion of the peripheral wall defining the ventilation chamber may be less than the thickness of the remaining portion of the peripheral wall.

In some embodiments, the thickness of the portion of the peripheral wall defining the ventilation chamber may vary along the longitudinal direction. In such embodiments, the portion of the peripheral wall that defines the ventilation chamber may be reduced toward the mouth end of the aerosol generating device. In such embodiments, the portion of the peripheral wall that defines the ventilation chamber may increase toward the mouth end of the aerosol generating device.

The change in peripheral wall thickness allows a vent chamber to be defined within the peripheral wall of the device cavity. This change or difference in thickness provides space between the aerosol generating article housed within the device and the peripheral wall of the device cavity, which in turn allows air to flow between the peripheral wall and the contained article. This allows airflow to reach the ventilation area or product wrapper to provide a ventilating or cooling effect to the aerosol.

The ventilation chamber can be annular. The ventilation chamber may be a continuous annular chamber defined in a peripheral wall of the device casing. This allows the vent chamber to surround the entire wrapper or vent zone of the contained article, thereby maximizing the amount of overlap between the vent cell and the vent zone of the aerosol-generating article contained. The greater the amount of overlap, the greater the ventilation that is provided to the aerosol generating product housed in the device. Additionally, the annular ventilation chamber can be simple and efficient to manufacture.

The ventilation chamber may have a longitudinal cross-section of a square shape, a rectangular shape or a triangular shape.

The ventilation chamber may be an annular portion (or annular sector) that partially surrounds the wrapper or vent area of the aerosol generating article contained. The aerosol generating device may contain several ventilation chambers. Such multiple ventilation chambers may include multiple ventilation chambers arranged in different longitudinal positions or multiple ventilation chambers arranged in different circumferential positions.

The length of the ventilation chamber may be less than or equal to approximately 8 mm. The length of the ventilation chamber may be less than or equal to approximately 4 mm. The length of the ventilation chamber may be less than or equal to approximately 3 mm.

The length of the ventilation chamber may be greater than or equal to approximately 1 mm. The length of the ventilation chamber may be greater than or equal to approximately 2 mm. The length of the ventilation chamber may be greater than or equal to approximately 1 mm.

The length of the ventilation chamber can range from about 1 mm to about 8 mm. The length of the ventilation chamber can range from about 2 mm to about 4 mm. The length of the ventilation chamber can range from about 3 mm to about 4 mm.

The length of the vent chamber may be at least about 2.5 percent of the length of the device cavity. The length of the vent chamber may be at least about 5 percent of the length of the device cavity. The length of the vent chamber may be at least about 7.5 percent of the length of the device cavity. The length of the vent chamber may be at least about 10 percent of the length of the device cavity.

The length of the vent chamber may be less than approximately 40 percent of the length of the device cavity. The length of the vent chamber may be less than approximately 30 percent of the length of the device cavity. The length of the vent chamber may be less than approximately 25 percent of the length of the device cavity. The length of the vent chamber may be less than approximately 20 percent of the length of the device cavity. The length of the vent chamber may be less than approximately 15 percent of the length of the device cavity.

The length of the vent chamber may range from about 2.5 percent to about 40 percent of the length of the device cavity. The length of the vent chamber may range from about 5 percent to about 30 percent of the length of the device cavity. The length of the vent chamber may range from about 7.5 percent to about 25 percent of the length of the device cavity.

By providing a relatively short or small ventilation chamber, it is possible to achieve a relatively shorter or smaller overlap between the aerosol generating article and the ventilation chamber of the aerosol generating device. As a result, a more targeted and localized portion of the aerosol generating article is cooled when placed within the device, and thus the cooling effect resulting from the entry of cooling air into the ventilation chamber may be more effective on that portion of the article.

The plenum depth refers to the radial distance that the plenum extends into the peripheral wall of the device casing. The depth of the ventilation chamber may be less than or equal to approximately 3 mm. The depth of the ventilation chamber may be less than or equal to approximately 2 mm. The depth of the ventilation chamber may be less than or equal to approximately 1.5 mm.

The depth of the ventilation chamber may be greater than or equal to approximately 0.5 mm. The depth of the ventilation chamber may be greater than or equal to approximately 1 mm.

The depth of the ventilation chamber can be from about 0.5 mm to about 3 mm. The depth of the ventilation chamber may range from about 1 mm to about 2 mm.

The cross-sectional area of the ventilation chamber may be greater than or equal to approximately 5 square meters. mm. The cross-sectional area of the ventilation chamber may be greater than or equal to approximately 20 square meters. mm. The cross-sectional area of the ventilation plenum may be greater than or equal to approximately 50 square meters. mm.

The cross-sectional area of the ventilation plenum may be less than or equal to approximately 275 square meters. mm. The cross-sectional area of the ventilation plenum may be less than or equal to approximately 150 square meters. mm.

The cross-sectional area of the ventilation plenum can range from approximately 5 square meters. mm to approximately 275 sq. mm. The cross-sectional area of the ventilation plenum can range from approximately 20 square meters. mm to approximately 150 sq. mm.

The thickness of the peripheral wall of the aerosol generating device housing, defining the device housing, may be greater than or equal to approximately 1 mm. The thickness of the peripheral wall may be greater than or equal to approximately 2 mm. The thickness of the peripheral wall may be greater than or equal to approximately 3 mm.

The thickness of the peripheral wall of the aerosol generating device housing, defining the device housing, may be less than or equal to approximately 10 mm. The thickness of the peripheral wall may be less than or equal to approximately 7.5 mm. The thickness of the peripheral wall may be less than or equal to approximately 5 mm.

The thickness of the peripheral wall of the aerosol generating device housing, defining the device housing, can range from about 1 mm to about 10 mm. The thickness of the peripheral wall can be from about 2 mm to about 7.5 mm. The thickness of the peripheral wall can be from about 3 mm to about 5 mm.

The depth of the ventilation chamber may be less than or equal to approximately 75 percent of the thickness of the peripheral wall. The depth of the ventilation chamber may be less than or equal to approximately 50 percent of the thickness of the peripheral wall. The depth of the ventilation chamber may be less than or equal to approximately 35 percent of the thickness of the peripheral wall.

The depth of the ventilation chamber may be greater than or equal to approximately 10 percent of the thickness of the peripheral wall. The depth of the ventilation chamber may be greater than or equal to approximately 20 percent of the thickness of the peripheral wall. The depth of the ventilation chamber may be greater than or equal to approximately 25 percent of the thickness of the peripheral wall.

The depth of the ventilation chamber may range from about 10 percent to about 75 percent of the peripheral wall thickness. The depth of the ventilation chamber may be from about 20 percent to about 50 percent of the thickness of the peripheral wall. The depth of the ventilation chamber may be from about 25 percent to about 35 percent of the thickness of the peripheral wall.

The aerosol generating device may include an extractor for removing an aerosol generating article housed in the aerosol generating device, the extractor being movable within a cavity of the device.

The extractor is configured to open the ventilation chamber when the extractor is in an operating position, the operating position being determined by a heater in contact with the aerosol-generating substrate of the aerosol-generating article.

The extractor contains a housing housing configured to accommodate an aerosol-generating product. The extractor housing (extractor body) may include an end wall and a peripheral wall. The extractor housing includes an open end opposite the end wall through which the aerosol generating article can be received. The aerosol-generating product is configured to rest against the end wall after being placed inside the extractor housing. The peripheral wall of the housing may surround the aerosol generating article when it is housed within the extractor. In such embodiments where an extractor is present, a peripheral wall of the extractor housing may define a vent chamber. Alternatively, a peripheral wall of the device casing may define a ventilation chamber.

The extractor may be sized such that, in its operative position, the housing housing extends between the first end of the vent chamber and the distal end of the device cavity. This allows the aerosol generating article to be directly deployed in relation to the ventilation chamber without the extractor body obstructing fluid communication between the ventilation chamber and the aerosol generating article.

The extractor may be sized such that, in the operative position, the containing body extends between the mouth end of the device cavity and the distal end of the device cavity. In such embodiments, the extractor body may have a cutout or multiple cutouts to allow the ventilation chamber to open toward the aerosol generating article upon insertion. The extractor body and the device cavity together may be configured to ensure alignment during use of said cutout or multiple cutouts with the vent chamber or multiple vent chambers. For example, the extractor body may include a protruding portion configured to engage with a groove or groove located in the housing of the aerosol generating device.

The aerosol generating device may include an elongated heater configured to be inserted into the aerosol generating article when the aerosol generating article is housed within a cavity of the device. The elongated heater may be configured with the cavity of the device. An elongated heater may extend into the cavity of the device. Alternative heating arrangements will be discussed below. However, in such embodiments where the heater extends into the cavity of the device, the extractor body includes an opening in the end wall to allow the heater to pass into the aerosol generating article. Such an opening may allow air to enter the interior of the extractor cavity so that air can flow through the aerosol-generating substrate rod of the aerosol-generating article during use. Alternatively, additional openings may be provided to allow air to enter the interior of the extractor cavity.

In some embodiments, the length of the extractor body may be less than the length of the device cavity. In such embodiments, when the extractor is in the operating position (where the extractor abuts the distal end of the device cavity), the vent chamber may be defined by a portion of the peripheral wall of the device housing that does not surround the extractor. This portion of the peripheral wall defines the ventilation chamber when the extractor is in the operating position. As such, said portion of the peripheral wall of the device casing may extend longitudinally beyond the extractor to define a ventilation chamber. The space or gap between the aerosol generating article and the peripheral wall of the device housing defines the ventilation chamber.

An air flow path may be determined to provide fluid communication between the aerosol-generating substrate, the aerosol-generating article housed within the cavity of the device, and the exterior of the aerosol-generating device. This air flow path allows an aerosol to be generated when a user puffs through an aerosol generating article heated within the aerosol generating device. Air from the air flow path may flow into the upstream end of the aerosol generating article and through the substrate of the aerosol generating article. Such an air flow path may be defined within the aerosol generating device.

In embodiments where an extractor is provided, an air flow path may be defined between a peripheral wall of the aerosol generating device housing and an outer surface of the extractor, with the vent chamber being in fluid communication with said air flow path.

In embodiments where an extractor is not provided, the air flow path may be defined within the thickness of the peripheral wall of the aerosol generating device housing. The air flow path may also be in fluid communication with the ventilation chamber.

The filter of the aerosol generating article may include a mouthpiece segment containing a filter material plug located downstream of the aerosol generating substrate rod; and a hollow tubular segment located between the mouthpiece segment and the aerosol-forming substrate rod, wherein a venting zone is located at a location along the upstream half of the hollow tubular segment.

The term "upstream half" refers to the portion or portion of an element between the upstream end of the element and the middle of the element.

The aerosol generating article may include a vent zone at a location along the hollow tubular segment at a distance of less than about 18 millimeters (mm) from the upstream end of the hollow tubular segment. The distance between the ventilation zone and the upstream end of the hollow tubular segment may be less than about 15 millimeters. Even more preferably, the distance between the ventilation zone and the upstream end of the hollow tubular segment is less than about 10 millimeters.

Additionally or alternatively, the distance between the ventilation zone and the upstream end of the hollow tubular segment may be at least about 2 millimeters. The distance between the ventilation zone and the upstream end of the hollow tubular segment may be at least about 4 millimeters. The distance between the ventilation zone and the upstream end of the hollow tubular segment may be at least about 6 millimeters.

The ventilation zone may be provided at a location along the hollow tubular segment at a distance of at least about 2 millimeters from the upstream end of the mouthpiece. Preferably, a vent zone is provided at a location along the hollow tubular segment at a distance of at least about 4 millimeters from the upstream end of the mouthpiece. Preferably, a ventilation zone is provided at a location along the hollow tubular segment at a distance of at least about 5 millimeters from the upstream end of the mouthpiece. Even more preferably, a vent zone is provided at a location along the hollow tubular segment at a distance of at least about 6 millimeters from the upstream end of the mouthpiece.

When the mixture of air and aerosol particles flowing through the aerosol generating article reaches the vent zone, outside air drawn into the hollow tubular segment through the vent zone is mixed with the aerosol. This quickly lowers the temperature of the aerosol mixture, while at the same time partially diluting the mixture of air and aerosol particles. By providing a ventilation zone at a distance from the upstream end of the mouthpiece segment within the above-described ranges, a cooling chamber is effectively provided immediately upstream of the mouthpiece, which advantageously promotes nucleation and growth of aerosol particles. Thus, the dilution effect of the ventilation air introduced into the hollow tubular segment is at least partially counteracted, which advantageously allows for satisfactory levels of aerosol delivery to the consumer.

The ventilation zone may be provided at a location along the hollow tubular segment at a distance of at least about 10 millimeters from the downstream end of the mouthpiece segment. The ventilation zone may be provided at a location along the hollow tubular segment at a distance of at least about 12 millimeters from the downstream end of the mouthpiece segment. The ventilation zone may be provided at a location along the hollow tubular segment at a distance of at least about 15 millimeters from the downstream end of the mouthpiece segment. This is advantageous in that it ensures that the ventilation zone is not blocked by the user's lips during use.

In some embodiments, a vent zone is provided at a location along the hollow tubular segment at a distance of from about 10 millimeters to about 25 millimeters from the downstream end of the mouthpiece segment, more preferably from about 12 millimeters to about 20 millimeters from the downstream end mouthpiece segment. In an exemplary embodiment, a vent zone is provided at a location along the hollow tubular segment at a distance of approximately 18 millimeters from the downstream end of the mouthpiece segment. In another exemplary embodiment, a vent zone is provided at a location along the hollow tubular segment at a distance of approximately 13 millimeters from the downstream end of the mouthpiece segment.

Without being limited by theory, it has been found that the temperature difference caused by the introduction of cooler outside air into the hollow tubular segment through the ventilation zone can have a beneficial effect on the nucleation and growth of aerosol particles.

In this scenario, which can be further complicated by droplet coalescence phenomena, temperature and cooling rate can play an important role in determining the system response. In general, different cooling rates can lead to significantly different time behavior with regard to the formation of the liquid phase (droplets), since the nucleation process is usually non-linear. Without being limited by theory, it is assumed that cooling can cause a rapid decrease in the number concentration of droplets, followed by a strong short-term increase in their growth (nucleation burst). This burst of nucleation may be more significant at lower temperatures. In addition, it may be that higher cooling rates may promote earlier onset of nucleation. In comparison, decreasing the cooling rate may have a beneficial effect on the final size that aerosol droplets ultimately reach.

Thus, the rapid cooling caused by the introduction of external air into the hollow tubular segment through the vent zone can be advantageously used to promote nucleation and growth of aerosol droplets. However, at the same time, the immediate disadvantage of introducing external air into the hollow tubular segment is the dilution of the aerosol stream delivered to the consumer.

It has further been found that in the aerosol generating articles of the present invention, the cooling and dilution effect caused by the introduction of ventilation air at a location along the channel formed by the above-described hollow tubular segment has an unexpected reducing effect on the generation and delivery of phenol-containing compounds.

The ventilation zone may include one or more rows of holes or perforations extending through the wrapper of the aerosol generating article. Openings or perforations in the ventilation area may pass through the filter of the aerosol-generating product.

The ventilation zone may be located at a position along the rod of the aerosol-forming substrate. The ventilation zone may be located at a position downstream of the aerosol-forming substrate rod. The ventilation zone may be positioned along the hollow tubular segment. The ventilation zone may be positioned along the support segment. The ventilation zone may be located at a position along the mouthpiece segment. The vent zone openings may extend through a hollow tubular segment, a support segment, or a mouthpiece segment, depending on where the vent zone is located.

The vent zone may be located along the hollow tubular segment, and the holes or perforations of the vent zone may extend through a peripheral wall of the hollow tubular segment. It will be understood that this is advantageous in that by concentrating the cooling effect due to ventilation on a short portion of the cavity defined by the hollow tubular segment, aerosol nucleation can be further improved. The reason for this is that faster and sharper cooling of the plume of volatile compounds from the aerosol-forming substrate is expected to particularly favor the formation of new aerosol particle nuclei.

The ventilation zone may contain only one row of holes or perforations. The row of holes or perforations may contain from 8 to 30 holes or perforations. The ventilation zone may surround the aerosol-generating article. The ventilation zone may surround the rod of the aerosol-forming substrate. The ventilation zone may surround the hollow tubular segment. The ventilation zone may surround the support segment. The ventilation zone may surround the mouthpiece segment.

The ventilation perforations may be of the same size. Alternatively, the ventilation perforations can be varied in size. By changing the number and size of the ventilation perforations, the amount of outside air admitted into the hollow tubular segment when a user takes a puff on the mouthpiece of the aerosol-generating article during use can be adjusted. In particular, the ventilation level of the aerosol-generating article can be advantageously controlled.

The ventilation perforations may be formed using any suitable technique, such as laser technology, mechanically perforating a hollow tubular segment as part of an aerosol generating article, or pre-perforating a hollow tubular segment before combining it with other elements to form an aerosol generating article. Preferably, the ventilation perforations are formed using in-line laser perforations.

In aerosol generating articles in accordance with the present invention, the total draw resistance (RTD) of the article depends essentially on the RTD of the aerosol generating substrate rod and the RTD of the filter mouthpiece segment, since the hollow tubular segment is essentially empty and, as such, essentially has only a minor effect on overall RTD. In practice, the hollow tubular segment may be adapted to generate RTD ranging from about 0 millimeters of water (about 0 Pa) to about 20 millimeters of water (about 200 Pa). The hollow tubular segment may be adapted to generate RTD from about 0 millimeters of water (about 0 Pa) to about 10 millimeters of water (about 100 Pa).

The aerosol generating product may have a total RTD of less than approximately 90 millimeters of water (approximately 900 Pa). The aerosol generating product may have a total RTD of less than approximately 80 millimeters of water (approximately 800 Pa). The aerosol generating article may have a total RTD of less than about 70 millimeters of water (about 700 Pa).

In addition or alternatively, the aerosol generating article may have a total RTD of at least about 30 millimeters of water (about 300 Pa). The aerosol generating article may have a total RTD of at least about 40 millimeters of water (about 400 Pa). The aerosol generating article may have a total RTD of at least about 50 millimeters of water (about 500 Pa).

The RTD of an aerosol-generating product can be defined as the negative pressure that must be applied, under the test conditions specified in ISO 3402, to the downstream end of the mouthpiece to maintain a uniform volumetric air flow of 17.5 ml/s through the mouthpiece. The RTD values listed above are intended to be measured against the aerosol generating device itself (i.e., prior to insertion of the product into the aerosol generating device) without blocking the ventilation zone perforations.

The distance between the ventilation zone and the upstream end of the aerosol generating article may be less than about 50 millimeters. The distance between the ventilation zone and the upstream end of the aerosol generating article may be less than about 45 millimeters. The distance between the ventilation zone and the upstream end of the aerosol generating article may be less than about 40 millimeters.

The distance between the ventilation zone and the upstream end of the aerosol generating article may be at least about 12 millimeters. The distance between the ventilation zone and the upstream end of the aerosol generating article may be at least about 15 millimeters. The distance between the ventilation zone and the upstream end of the aerosol generating article may be at least about 20 millimeters. In some embodiments, the distance between the ventilation zone and the upstream end of the aerosol generating article may be at least about 25 millimeters.

The distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be at least about 2 millimeters. The distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be at least about 5 millimeters. The distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be at least about 10 millimeters. In some embodiments, the distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be at least about 15 millimeters.

The distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be less than about 35 millimeters. The distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be less than about 30 millimeters. The distance between the ventilation zone and the downstream end of the aerosol-forming substrate rod may be less than about 25 millimeters.

The aerosol generating substrate rod preferably has an outer diameter that is approximately equal to the outer diameter of the aerosol generating article.

Preferably, the aerosol generating substrate rod has an outer diameter of at least about 5 millimeters. The aerosol generating substrate rod may have an outer diameter of from about 5 millimeters to about 12 millimeters, such as from about 5 millimeters to about 10 millimeters, or from about 6 millimeters to about 8 millimeters. In a preferred embodiment, the aerosol generating substrate rod has an outer diameter of 7.2 millimeters within 10 percent accuracy.

The aerosol generating substrate rod may have a length of from about 5 millimeters to about 100 mm. Preferably, the rod of the aerosol generating substrate has a length of at least about 5 millimeters, more preferably at least about 7 millimeters. In addition or alternatively, the rod of the aerosol generating substrate preferably has a length of less than about 80 millimeters, more preferably less than about 65 millimeters, even more preferably less than about 50 millimeters. In particularly preferred embodiments, the aerosol generating substrate rod has a length of less than about 35 millimeters, more preferably less than 25 millimeters, even more preferably less than about 20 millimeters. In one embodiment, the rod of the aerosol generating substrate may be approximately 10 millimeters in length. In a preferred embodiment, the aerosol generating substrate rod is approximately 12 millimeters in length.

Preferably, the rod of the aerosol generating substrate has a substantially uniform cross-section along the length of the rod. Particularly preferably, the rod of the aerosol generating substrate has a substantially circular cross-section.

In preferred embodiments, the aerosol-forming substrate comprises one or more assembled sheets of homogenized tobacco material. Preferably, one or more sheets of homogenized tobacco material are textured. As used herein, the term “textured sheet” means a sheet that has been corrugated, embossed, blind embossed, perforated, or otherwise deformed. Textured sheets of homogenized tobacco material for use in the present invention may contain a plurality of spaced apart indentations, projections, perforations, or a combination thereof. According to a particularly preferred embodiment of the present invention, the rod of the aerosol-forming substrate comprises an assembled corrugated sheet of homogenized tobacco material surrounded by a wrapper.

As used herein, the term "corrugated sheet" is intended to be used synonymously with the term "creped sheet" and means a sheet having a plurality of substantially parallel folds or corrugations. Preferably, the corrugated sheet of homogenized tobacco material contains a plurality of folds or corrugations substantially parallel to the cylindrical axis of the rod according to the present invention. This advantageously facilitates the assembly of the corrugated sheet of homogenized tobacco material to form a rod. However, it should be understood that the corrugated sheets of homogenized tobacco material for use in the present invention may alternatively or additionally comprise a plurality of substantially parallel folds or corrugations located at an acute or obtuse angle to the cylindrical axis of the rod. In some embodiments, sheets of homogenized tobacco material for use in the core of an article according to the present invention may be substantially uniformly textured over substantially their entire surface. For example, corrugated sheets of homogenized tobacco material for use in making a rod used in an aerosol generating article in accordance with the present invention may comprise a plurality of substantially parallel folds or corrugations that are substantially evenly spaced across the width of the sheet.

Sheets or webs of homogenized tobacco material for use in the present invention may have a tobacco content of at least about 40 percent by weight on a dry weight basis, more preferably at least about 60 percent by weight on a dry weight basis, more preferably at least about 70 percent by weight on a dry weight basis, and most preferably at least about 90 percent by weight on a dry weight basis.

Sheets or webs of homogenized tobacco material for use in an aerosol-forming substrate may contain one or more internal binders, ie endogenous tobacco binders, one or more external binders, ie exogenous tobacco binders, or a combination thereof to help agglomerate the bulk tobacco. Alternatively or additionally, sheets of homogenized tobacco material for use in an aerosol-forming substrate may contain other additives, including, but not limited to, tobacco and non-tobacco fibers, aerosol-forming agents, humectants, plasticizers, flavoring agents, fillers, aqueous and non-aqueous solvents, and their combinations.

Suitable external binders for inclusion in sheets or webs of homogenized tobacco material for use in an aerosol-forming substrate are known in the art and include, but are not limited to: gums such as, for example, guar gum, xanthan gum, gum arabic and locust bean gum wood; cellulose binders such as, for example, hydroxypropylcellulose, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose and ethylcellulose; polysaccharides, such as, for example, starches, organic acids, such as alginic acid, salts of bases conjugate with organic acids, such as sodium alginate, agar and pectins; and their combinations.

Suitable non-tobacco fibers for inclusion in sheets or webs of homogenized tobacco material for use in an aerosol-forming substrate are known in the art and include, but are not limited to: cellulose fibers; softwood fibers; hardwood fibers; jute fibers and their combinations. Prior to incorporation into sheets of homogenized tobacco material for use in an aerosol-forming substrate, non-tobacco fibers may be treated by suitable methods known in the art, including, but not limited to: mechanical pulping; cleaning; chemical pulp production; bleaching; sulfate pulp production; and their combinations.

Sheets or webs of homogenized tobacco material may contain an aerosol-forming agent. As used herein, the term “aerosol generating agent” describes any suitable known compound or mixture of compounds that, when used, facilitates the formation of an aerosol and that is substantially resistant to thermal degradation at the operating temperature of the aerosol generating article.

Suitable aerosol-forming agents are known in the art and include, but are not limited to: polyhydric alcohols such as propylene glycol, triethylene glycol, 1,3-butanediol and glycerol; polyhydric alcohol esters such as glycerol mono-, di- or triacetate; and aliphatic esters of mono-, di- or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyl tetradecanedioate.

Preferred aerosol formers are polyhydric alcohols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerol.

Sheets or webs of homogenized tobacco material may contain a single aerosol-forming agent. Alternatively, the sheets or webs of homogenized tobacco material may contain a combination of two or more substances to form an aerosol.

The sheets or webs of homogenized tobacco material have an aerosol forming agent content of greater than about 10 percent on a dry weight basis. Preferably, the sheets or webs of homogenized tobacco material have an aerosol forming agent content of greater than about 12 percent on a dry weight basis. More preferably, the sheets or webs of homogenized tobacco material have an aerosol forming agent content of greater than about 14 percent on a dry weight basis. Even more preferably, the sheets or webs of homogenized tobacco material have an aerosol forming agent content of greater than about 16 percent on a dry weight basis.

Sheets of homogenized tobacco material may have an aerosol-forming agent content of from about 10 percent to about 30 percent on a dry weight basis. Preferably, the sheets or webs of homogenized tobacco material have an aerosol forming agent content of less than 25 percent on a dry weight basis.

In a preferred embodiment, the sheets of homogenized tobacco material have an aerosol forming agent content of approximately 20 percent on a dry weight basis.

Sheets or webs of homogenized tobacco for use in the aerosol generating product of the present invention can be manufactured by methods known in the art, for example, by methods disclosed in international patent application WO-A-2012/164009 A2. In a preferred embodiment, sheets of homogenized tobacco material for use in an aerosol generating product are formed from a slurry containing bulk tobacco, guar gum, cellulose fibers and glycerin by an injection molding process.

Alternative arrangements of homogenized tobacco material in a rod for use in an aerosol generating product are known to one of ordinary skill in the art and may include a plurality of stacked sheets of homogenized tobacco material, a plurality of elongated tubular members formed by twisting strips of homogenized tobacco material about their longitudinal axes, etc.

As a further alternative, the aerosol-forming substrate rod may comprise a non-tobacco-based nicotine-containing material, such as a sheet of non-tobacco sorbent material incorporated with nicotine (eg, in the form of a nicotine salt) and an aerosol-forming agent. Examples of such rods are described in international application WO-A-2015/052652. In addition or alternatively, the rod of the aerosol-forming substrate may comprise a non-tobacco plant material, such as an aromatic non-tobacco plant material.

The aerosol-forming substrate is surrounded by a wrapper. The wrapper may be formed from porous or non-porous sheet material. The wrapper may be formed from any suitable material or combination of materials. Preferably the wrapper is a paper wrapper.

The mouthpiece segment includes a filter material plug configured to remove particulate components, gaseous components, or a combination thereof. Suitable filter materials are known in the art and include, but are not limited to: fibrous filter materials, such as, for example, cellulose acetate plug; viscose fibers, polyhydroxyalkanoate (PHA) fibers, polylactic acid (PLA) fibers and paper; adsorbents such as, for example, activated alumina, zeolites, molecular sieves and silica gel; and their combinations. Additionally, the filter material plug may further comprise one or more aerosol modifying agents. Suitable aerosol modifying agents are known in the art and include, but are not limited to, flavoring agents such as, for example, menthol. In some embodiments, the mouthpiece may further comprise a recess at the mouthpiece end downstream of the filter material plug. For example, the mouthpiece may comprise a hollow tube arranged in longitudinal alignment with and immediately downstream of a plug of filter material, the hollow tube defining a cavity at the mouthpiece end that is open to the external environment at the downstream end of the mouthpiece and article, generating aerosol.

The length of the mouthpiece is preferably at least about 4 millimeters, more preferably at least about 6 millimeters, even more preferably at least about 8 millimeters. Additionally or alternatively, the length of the mouthpiece is preferably less than 25 millimeters, more preferably less than 20 millimeters, even more preferably less than 15 millimeters. In some preferred embodiments, the length of the mouthpiece is from about 4 millimeters to about 25 millimeters, more preferably from about 6 millimeters to about 20 millimeters. The length of the mouthpiece can be approximately 7 millimeters. The length of the mouthpiece can be approximately 12 millimeters.

The length of the hollow tubular segment is preferably at least about 10 millimeters. More preferably, the length of the hollow tubular segment is at least about 15 millimeters. Additionally or alternatively, the length of the hollow tubular segment is preferably less than about 30 millimeters. More preferably, the length of the hollow tubular segment is less than about 25 millimeters. Even more preferably, the length of the hollow tubular segment is less than about 20 millimeters. In some preferred embodiments, the length of the hollow tubular segment is from about 10 millimeters to about 30 millimeters, more preferably from about 12 millimeters to about 25 millimeters, even more preferably from about 15 millimeters to about 20 millimeters. For example, in a particularly preferred embodiment, the length of the hollow tubular segment is approximately 18 millimeters. In another particularly preferred embodiment, the length of the hollow tubular segment is approximately 13 millimeters.

The thickness of the peripheral wall of the hollow tubular segment is less than about 1.5 millimeters. Preferably, the thickness of the peripheral wall of the hollow tubular segment is less than about 1250 micrometers, more preferably less than about 1000 micrometers, even more preferably less than about 900 micrometers. In particularly preferred embodiments, the peripheral wall thickness of the hollow tubular segment is less than about 800 micrometers.

Additionally or alternatively, the thickness of the peripheral wall of the hollow tubular segment is at least about 100 micrometers. Preferably, the thickness of the peripheral wall of the hollow tubular segment is at least about 200 micrometers.

The overall length of the aerosol generating article of the present invention is preferably at least about 40 millimeters. In addition or alternatively, the overall length of the aerosol generating article in accordance with the present invention is preferably less than about 70 millimeters, more preferably less than about 60 millimeters, even more preferably less than about 50 millimeters. In preferred embodiments, the overall length of the aerosol generating article is from about 40 millimeters to about 70 millimeters. In an exemplary embodiment, the overall length of the aerosol generating article is approximately 45 millimeters.

The support element (or support segment) may have a length of from about 5 millimeters to about 15 millimeters. In a preferred embodiment, the support element has a length of approximately 8 millimeters.

The heater may include an elongated heating element configured to penetrate the rod of the aerosol-generating substrate while housing the aerosol-generating article within the aerosol-generating device.

The heater may be any suitable type of heater. The heater may internally heat the aerosol generating article. Alternatively, the heater may externally heat the aerosol generating article. Such an outer heater may surround the aerosol generating article when it is inserted into or housed within the aerosol generating device.

In some embodiments, the heater is configured to heat the outer surface of the aerosol-forming substrate. In some embodiments, the heater is configured to be inserted into an aerosol-forming substrate while containing the aerosol-forming substrate within a cavity. The heater may be located inside the cavity. The heater may extend into the cavity. The heater may be an elongated heater. The elongated heater may be plate-shaped. The oblong heater may be shaped like a pin. The oblong heater may have the shape of a cone. In some embodiments, the aerosol generating device includes an elongated heater for insertion into the aerosol generating article while housing the aerosol generating article within a cavity.

The heater may include at least one heating element. The at least one heating element may be any suitable type of heating element. In some embodiments, the device includes only one heating element. In some embodiments, the device includes multiple heating elements.

The heater may include at least one resistive heating element. Preferably the heater comprises a plurality of resistive heating elements. Preferably, the resistive heating elements are electrically connected in a parallel arrangement. Advantageously, providing multiple resistive heating elements electrically connected in a parallel arrangement can facilitate delivery of the desired electrical power to the heater while reducing or minimizing the voltage required to provide the desired electrical power. Advantageously, reducing or minimizing the voltage required to operate the heater can make it easier to reduce or minimize the physical size of the power supply.

Suitable materials for forming the at least one resistive heating element include, but are not limited to: semiconductors such as doped ceramics, electrically conductive ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials , made of ceramic material and metal material. Such composite materials may contain alloyed or unalloyed ceramics. Examples of suitable doped ceramics include doped silicon carbides. Examples of suitable metals include titanium, zirconium, tantalum and platinum group metals. Examples of suitable metal alloys include stainless steel, nickel, cobalt, chromium, aluminum, titanium, zirconium, hafnium, niobium, molybdenum, tantalum, tungsten, tin, gallium, manganese and iron-containing alloys, as well as superalloys based on nickel, iron, cobalt, stainless steel, Timetal® and iron-manganese-aluminum alloys.

In some embodiments, the at least one resistive heating element includes one or more stamped portions of an electrically resistive material, such as stainless steel. Alternatively, the at least one resistive heating element may comprise a heating wire or filament, such as a Ni-Cr (nickel chromium), platinum, tungsten or alloy wire.

In some embodiments, the at least one heating element includes an electrically insulating substrate, wherein the at least one resistive heating element is provided on the electrically insulating substrate.

The electrically insulating substrate may comprise any suitable material. For example, the electrically insulating substrate may comprise one or more of the following: paper, glass, ceramic, anodized metal, coated metal, and polyimide. Ceramics may contain mica, aluminum oxide (Al2O3) or zirconium dioxide (ZrO2). Preferably, the electrically insulating substrate has a thermal conductivity of less than or equal to about 40 watts per meter Kelvin, preferably less than or equal to about 20 watts per meter Kelvin, and ideally less than or equal to about 2 watts per meter Kelvin.

The heater may comprise a heating element comprising a rigid electrically insulating substrate with one or more electrically conductive tracks or wire disposed on its surface. The size and shape of the electrically insulating substrate may allow it to be inserted directly into the aerosol-forming substrate. If the electrically insulating substrate is not sufficiently rigid, the heating element may contain additional reinforcing agent. Current may pass through one or more electrically conductive paths to heat the heating element and the aerosol-forming substrate.

In some embodiments, the heater includes an induction heating arrangement. The induction heating arrangement may include an induction coil and a power supply configured to provide high frequency oscillating current to the induction coil. As used herein, the term “high frequency oscillatory current” means oscillatory current with a frequency of 500 kHz to 30 MHz. The heater may advantageously include a DC-AC converter for converting DC power supplied by the DC power supply to AC current. The induction coil may be configured to generate a high-frequency oscillating electromagnetic field when receiving a high-frequency oscillating current from a power supply. The induction coil may be configured to generate a high frequency oscillatory electromagnetic field within the cavity of the device. In some embodiments, the induction coil may substantially surround the cavity of the device. The induction coil may extend at least partially along the length of the cavity of the device.

The heater may include an induction heating element. The induction heating element may be a current collecting element. As used herein, the term "susceptor element" refers to an element containing a material that is capable of converting electromagnetic energy into heat. When the current collector element is in an alternating electromagnetic field, the current collector heats up. Heating of the current collector element may result from at least one of hysteresis losses and eddy currents induced in the current collector, depending on the electrical and magnetic properties of the current collector material.

The susceptor element may be configured such that when the aerosol generating article is placed in the cavity of the aerosol generating device, the oscillating electromagnetic field generated by the induction coil induces a current in the susceptor element, resulting in heating of the susceptor element. In these embodiments, the aerosol generating device is preferably capable of generating a fluctuating electromagnetic field having a magnetic field strength (magnetic field strength) of 1 to 5 kiloamperes per meter (kA/m), preferably 2 to 3 kA/m, for example, approximately 2.5 kA/m. The electrical aerosol generating device is preferably capable of generating a fluctuating electromagnetic field having a frequency of 1 to 30 MHz, for example 1 to 10 MHz, for example 5 to 7 MHz.

In some embodiments, the current collecting element is located in the aerosol generating article. In these embodiments, the current collecting element is preferably positioned in contact with the aerosol-forming substrate. The current collecting element may be located in the aerosol-forming substrate.

In some embodiments, the current collecting element is located in the aerosol generating device. In these embodiments, the current collecting element may be located in the cavity. The aerosol generating device may contain only one current-receiving element. The aerosol generating device may contain several current-receiving elements.

In some embodiments, the susceptor element is configured to heat the outer surface of the aerosol-forming substrate. In some embodiments, the susceptor element is configured to be inserted into an aerosol-forming substrate while housing the aerosol-forming substrate within a cavity.

The current collecting element may comprise any suitable material. The current collecting element may be formed from any material that can be inductively heated to a temperature sufficient to release volatile compounds from the aerosol-forming substrate. Suitable materials for the elongated current collecting element include graphite, molybdenum, silicon carbide, stainless steels, niobium, aluminum, nickel, nickel compounds, titanium and composite metal materials. Some current collecting elements contain metal or carbon. Advantageously, the current collecting element may comprise or consist of a ferromagnetic material, for example ferritic iron, a ferromagnetic alloy, for example ferromagnetic steel or stainless steel, ferromagnetic particles and ferrite. A suitable current collecting element may be made of or comprise aluminum. The current collecting element preferably contains more than about 5 percent, preferably more than about 20 percent, more preferably more than about 50 percent, or more than about 90 percent ferromagnetic or paramagnetic materials. Some elongated current collecting elements can be heated to temperatures in excess of approximately 250 degrees Celsius.

The current collecting element may comprise a non-metallic core with a metal layer located on the non-metallic core. For example, the current collecting element may include metal tracks formed on the outer surface of a ceramic core or substrate.

In some embodiments, the aerosol generating system includes at least one resistive heating element and at least one induction heating element. In some embodiments, the aerosol generating system includes a combination of resistive heating elements and induction heating elements.

The aerosol generating device contains a power supply. The power supply may be a DC power supply. In some embodiments, the power supply is a battery. The power supply may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt battery, a lithium iron phosphate battery, or a lithium polymer battery. However, in some embodiments, the power supply may be another type of charge storage device, such as a capacitor. The power supply may require recharging and may have a capacity to store sufficient energy for one or more user operations, such as one or more aerosol generation sessions. For example, the power supply may have sufficient capacity to provide continuous heating of the aerosol-forming substrate for a period of approximately six minutes, which corresponds to the typical time required to smoke a conventional cigarette, or for a period that is a multiple of six minutes. In another example, the power supply may have sufficient capacity to allow a given number of puffs or individual activations of the heater.

Specific embodiments will now be described with reference to the drawings, in which:

in fig. 1 is a schematic cross-sectional view of a comparative aerosol generating device and a comparative aerosol generating system;

in fig. 2 is a schematic cross-sectional representation of an embodiment of an aerosol generating system;

in fig. 3 is a schematic cross-sectional view of another embodiment of an aerosol generating system; And

in fig. 4 is a schematic cross-sectional view of an additional embodiment of an aerosol generating system.

In fig. 1 illustrates an aerosol generating system 100 comprising a comparative aerosol generating device 10 and an aerosol generating article 1. The aerosol generating device 10 includes a housing 4 extending between the mouthpiece end 2 and a distal end (not shown). The housing 4 includes a peripheral wall 6. The peripheral wall 6 defines a cavity of the device for housing the aerosol generating article 1. The extractor 8 is located inside the device cavity, defined by the peripheral wall 6, and is configured to accommodate and remove the aerosol-generating product 1 from the device cavity. The extractor 8 contains a body having an open mouth end and a closed end. The closed end of the extractor body 8 is defined by an end wall. The device cavity is further defined by a closed distal end and an open mouthpiece end. The mouth end of the device cavity is located at the mouth end of the aerosol generating device 10. The aerosol-generating article 1 is configured to be received through the mouthpiece end of the device cavity and is configured to abut either the closed end of the device cavity or the closed end of the extractor 8. The closed end of the extractor 8 is configured to substantially abut the closed end of the device cavity or being near him.

An air flow path 32 is defined around the outer surface of the extractor 8 and between the peripheral wall 6 of the aerosol generating device housing 4 and the outer surface of the extractor 8. Air enters the extractor 8 through an opening (not shown) present at the closed end of the body of the extractor 8. This allows air to flow through the rod of the aerosol-generating substrate 12 and further downstream through the rest of the aerosol-generating article 1 when pulled by the user on the mouthpiece end of the aerosol-generating article 1.

The aerosol generating device 10 further includes a heater (not shown) and a power supply (not shown) for supplying power to the heater. A controller (not shown) is also provided for controlling such power supply to the heater. The heater is configured to heat the aerosol generating article 1 during use when the aerosol generating article 1 is housed inside the device 10.

The aerosol-generating article 1 includes an aerosol-generating substrate rod 12, a hollow support segment 14, a hollow tubular segment 16, and a mouthpiece segment 18. These four elements are arranged end-to-end, longitudinally aligned, and surrounded by a wrapper 22 to form the aerosol-generating article 1. The aerosol generating article 1 shown in FIG. 1 is particularly suitable for use with an electrical aerosol generating device 1 comprising a heater for heating the aerosol generating substrate rod 12.

The rod of aerosol-forming substrate 12 has a length of approximately 12 millimeters and a diameter of approximately 7 millimeters. The rod 12 is cylindrical in shape and has a substantially circular cross-section. The rod 12 contains a collected sheet of homogenized tobacco material. The hollow cellulose acetate tube (hollow support segment) 14 is approximately 8 millimeters long and 1 millimeter thick.

The die segment 18 contains an insert of 8 denier per fiber cellulose acetate rod and is approximately 7 millimeters in length.

The hollow tubular segment 16 is provided as a cylindrical tube having a length of approximately 18 millimeters and a tube wall thickness of approximately 100 micrometers.

The aerosol generating article 1 includes a vent zone 26 at a distance of at least about 5 millimeters from the upstream end of the mouthpiece segment 18. The vent zone 26 is at a distance of at least about 12 millimeters from the downstream end of the article 1. , generating an aerosol. Ventilation zone 26 is located at least approximately 21 millimeters from the downstream end of rod 12. Ventilation zone 26 includes a row or line of perforations extending through wrapper 22.

As shown in FIG. 1, the ventilation zone 26 of the aerosol generating article 1 is open during use of the system 100.

In fig. 2 depicts an embodiment of an aerosol generating system 200 comprising an aerosol generating device 20 and an aerosol generating article 1. The aerosol generating device 20 includes features similar to those described with respect to the aerosol generating device 10.

The aerosol generating device 20 further includes a ventilation chamber 28 configured to surround the ventilation zone 26 of the aerosol generating article 1 when placed within the aerosol generating device 20. The cavity of the device has a total length of 30 mm, and the ventilation chamber 28 has a length of 6 mm. The ventilation chamber 28 has a longitudinal cross-section of a triangular shape. The ventilation chamber 28 is also annular, so that the ventilation chamber 28 extends over the entire inner periphery of the peripheral wall 6. During use, the ventilation chamber 28 surrounds the outer periphery of the aerosol generating article 1.

The ventilation chamber 28 is in fluid communication with the outer surface of the aerosol generating article 1 and the exterior of the device 10 through the mouthpiece end of the device 10. Specifically, the ventilation chamber 28 is configured to be in fluid communication with the ventilation zone 26 of the product 1. Ventilation chamber 28 is also configured to communicate via fluid with air flow path 32. A ventilation chamber 28 extends from the mouthpiece end 2 of the device 20 toward the distal end of the device cavity. As shown in FIG. 2, the ventilation chamber 28 is defined within the thickness of the peripheral wall 6.

In fig. 3 depicts another embodiment of an aerosol generating system 300 comprising an aerosol generating device 30 and an aerosol generating article 1. The aerosol generating device 30 includes an extractor 8 that is shorter than the length of the device cavity. During use, when the aerosol generating article 10 is placed in the device 30, a space is formed between the proximal end of the extractor 8 and the mouth end 2 of the device 30. Such space forms a ventilation chamber 128 that surrounds the aerosol generating article 1, in particular the ventilation zone 26 The ventilation chamber 128 is configured to be in fluid communication with the ventilation zone 26 of the product 1. The ventilation chamber 28 is also configured to be in fluid communication with an air flow path 32 defined around the extractor 8. The ventilation chamber 128 has a length of 6 mm.

The ventilation chamber 128 has a rectangular longitudinal cross-section. The ventilation chamber 128 is also annular, so that the ventilation chamber 28 extends over the entire inner periphery of the peripheral wall 6. In other words, during use, the ventilation chamber 28 surrounds the outer periphery of the aerosol generating article 1. A ventilation chamber 128 extends from the mouthpiece end 2 of the device 30.

In both embodiments in FIG. 2 and 3, the ventilation chamber 28, 128 is in direct fluid communication with the exterior of the aerosol generating device 20, 30.

In fig. 4 depicts another embodiment of an aerosol generating system 400 comprising an aerosol generating device 40 and an aerosol generating article 1. The aerosol generating device 40 contains an extractor 8.

The aerosol generating device 40 includes a ventilation chamber 228 configured to surround the ventilation zone 26 of the aerosol generating article 1 when placed within the aerosol generating device 40. The device cavity has an overall length of 30 mm, and the ventilation chamber 228 has a length of 6 mm. The ventilation chamber 228 has a rectangular longitudinal cross-section. The ventilation chamber 228 is also annular, so that the ventilation chamber 228 extends over the entire inner periphery of the peripheral wall 6. During use, the ventilation chamber 228 surrounds the outer periphery of the aerosol generating article 1.

The ventilation chamber 228 is configured to be in fluid communication with the ventilation zone 26 of the product 1 and the exterior of the aerosol generating device 40. The ventilation chamber 228 is also configured to be in fluid communication with an air flow path 32 formed around the extractor 8.

As shown in FIG. 4, the ventilation chamber 228 is located away from the mouthpiece end 2 of the aerosol generating device 40. The ventilation chamber 228 is not in direct fluid communication with the exterior of the aerosol generating device 40. The ventilation chamber 228 is in fluid communication with the exterior of the aerosol generating device 40 through a plurality of chamber inlets 44. Each chamber inlet 44 extends between the vent chamber 228 and the mouth end 2 of the aerosol generating device 40 to provide fluid communication between the vent chamber 228 and the mouth end 2 of the aerosol generating device 40.

Each chamber inlet 44 has a circular cross-section. The diameter of each plenum inlet 44 is substantially less than the depth (ie, radial depth) of the vent plenum 228. As shown in FIG. 4, the depth of the ventilation chamber 228 is more than five times the diameter of the chamber inlet 44.

During use of the above-described aerosol generating systems 200, 300, 400, when the aerosol generating article 1 is placed inside the cavity of the aerosol generating device 20, 30, 40, the ventilation zone 26 of the aerosol generating article 1 cannot be directly blocked by the user. This is the result of covering the peripheral wall 6 with a ventilation zone 26.

Claims (30)

1. An aerosol generating system containing: aerosol generating product containing: aerosol-forming substrate rod; And a filter located downstream of the aerosol-forming substrate rod; wherein the aerosol generating substrate rod and the filter are assembled within the wrapper, the aerosol generating article comprising a ventilation zone located on the wrapper, the ventilation zone including a plurality of holes extending through the wrapper; And an aerosol generating device having a distal end and a mouthpiece end, the aerosol generating device comprising: a housing comprising a peripheral wall, the peripheral wall defining a cavity of the device for housing the aerosol generating article so that it can be removed at the mouth end of the device; And a heater for heating the aerosol-generating substrate when the aerosol-generating article is placed inside the cavity of the device; wherein the aerosol generating system is configured such that when the aerosol generating article is placed inside the device cavity, the ventilation zone of the aerosol generating article is located inside the device cavity, and a portion of the inner surface of the peripheral wall covering the ventilation zone is spaced away from the product , generating an aerosol, to form a ventilation chamber inside the peripheral wall, wherein the ventilation chamber is configured to be in fluid communication with the exterior of the aerosol generating device through the mouth end of the device and the ventilation zone of the aerosol generating article, such that air is allowed to enter the ventilation chamber through the mouth end of the aerosol generating device when the aerosol generating article is placed inside the cavity of the device, and the thickness of the portion of the peripheral wall forming the ventilation chamber is different from the thickness of the other portion of the peripheral wall. 2. The aerosol generating system according to claim 1, characterized in that the ventilation chamber is formed within the thickness of the peripheral wall. 3. The aerosol generating system according to claim 1 or 2, characterized in that the ventilation chamber is located adjacent to the mouth end of the aerosol generating device. 4. An aerosol generating system according to any one of claims. 1-3, characterized in that the downstream end of the ventilation chamber is located at the mouthpiece end of the aerosol generating device. 5. The aerosol generating system according to claim 1 or 2, characterized in that the ventilation chamber is located in a longitudinal position away from the mouthpiece end of the aerosol generating device. 6. The aerosol generating system according to claim 5, characterized in that the ventilation chamber is configured to communicate via fluid with the external part of the aerosol generating device through the inlet of the chamber formed in the housing. 7. The aerosol generating system of claim 6, wherein the chamber inlet extends between the ventilation chamber and the mouth end of the aerosol generating device. 8. The aerosol generating system of any one of the preceding claims, wherein the ventilation chamber is configured to be in fluid communication with the exterior of the aerosol generating device through a mouth end surface defining the mouth end of the aerosol generating device. 9. An aerosol generating system according to any of the preceding claims, characterized in that the thickness of the portion of the peripheral wall forming the ventilation chamber is less than the thickness of the other portion of the peripheral wall. 10. The aerosol generating system according to claim 9, characterized in that the thickness of the portion of the peripheral wall forming the ventilation chamber varies along the longitudinal direction. 11. An aerosol generating system according to any previous paragraph, characterized in that the ventilation chamber is annular. 12. The aerosol generating system according to any of the preceding claims, wherein the aerosol generating device includes an extractor for removing an aerosol generating article housed in the aerosol generating device, wherein the extractor is movable within the cavity of the device. 13. The aerosol generating system according to claim 12, characterized in that the extractor is configured to open the ventilation chamber when the extractor is in an operating position, the operating position being determined by a heater in contact with the aerosol-generating substrate of the aerosol-generating article . 14. The aerosol generating system of claim 12 or 13, wherein the air flow path is defined between a peripheral wall of the body of the aerosol generating device and the outer surface of the extractor, the ventilation chamber being in fluid communication with said air flow path. 15. An aerosol-generating system according to any of the previous paragraphs, characterized in that the filter of the aerosol-generating product contains: a mouthpiece segment containing a plug of filter material arranged downstream of the aerosol-forming substrate rod; And a hollow tubular segment located between the mouthpiece segment and the rod of the aerosol-forming substrate, wherein the ventilation zone is located at a location along the hollow tubular segment. 16. The aerosol generating system of claim 15, wherein the ventilation zone is located at a location along the upstream half of the hollow tubular segment. 17. The aerosol generating system of claim 15 or 16, wherein the plurality of ventilation zone openings extend through the hollow tubular segment. 18. The aerosol generating system of any one of the preceding claims, wherein the heater comprises an elongated heating element configured to penetrate the rod of the aerosol generating substrate when the aerosol generating article is positioned within the aerosol generating device.

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